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Merlin 1500S

Gas Interlock System

EM Stop LED

If an emergency shut off button (either remote or on the panel) is pressed, the LED will illuminate

AMBER and the gas will be turned off. The EM Stop button must be re-set before restarting the

system.

OFF = OK

AMBER = EM Stop button pressed

Gas Detected LED

Under normal working conditions this LED is off. If the external Merlin detector connected detects

gas this will show RED and the Gas valve will turn off.

OFF = OK

RED = Gas detected.

CO2 High LED

Under normal working conditions this LED is off. If the concentration of CO2 in the air is at

alarm level (relevant detector required), the LED will show RED and the Gas valve will turn off.

OFF = OK

RED = the concentration of CO2 is at alarm level.

3.3

Mode

Under normal working conditions the Merlin 1500S monitors the ventilation and the concentration

level of CO

In the event of ventilation failure or if the CO

shut off the gas supply.

The Merlin 1500S features a 'CO

supply in the event of a fan failure. There is a 'CO

panel. This button will only be available to use when 'Fan fault' LED illuminates Red. To enable

the CO

Mode, the 'CO

and CO

Mode LED will come on. In this mode, the Merlin 1500S will monitor only the CO

to ensure there is a safe working environment. This mode will allow the gas valve to open for 8

hours each time the system is energised, provided there are satisfactory levels of CO

At the end of 8 hours, the gas valve will close and CO

To reinstate the system the panel has to be restarted. The 'CO2 Mode' will be permanently

disabled if a CO2 Sensor is not detected at power up.

3.4

Using the Emergency Shut Off

The Emergency shut off button is located on the front of the panel. There is also a facility for

remote shut off buttons to be wired in series.

The Emergency shut off button(s) will cut off the gas supply when activated.

To reinstate the system, the Emergency shut off button(s) will need to be reset and the panel

restarted.

Rev: 03 Date: 08-01-18

Mode' this allows the kitchen to have the access to the gas

button' has to be pressed for 5 seconds. The Fan Fault LED will go off

User & Installation Manual

level is at alarm level, the panel will

Mode' button located on the front of the

Mode LED will be flashing.

levels